Do you find any evidence of heavy metals in any of your lakes? If so, are these metals naturally occurring, or suspected to be unwanted man made pollution?

I’m avid reader and have read most of my life. I began reading James Bond books in HS in 1963..Her Majesty’s Secret Service, at age 14. Now 75 yo, I switched to a gen 2 Kindle abt 10 years ago. Ran out of memory, switched to a Kindle Fire abt 4 years ago. I find that the Kindle is easier to deal with, transport, and I prolly have 500 books on it. I have a dictionary on it so I can learn new words and British slang. I can get my emails on it as well. I get my books from Amazon, and they know my reading habits, so they email book summaries that I might like. So after my formal retirement in 2012, I began reading even more. This is not specifically a plug for Kindle or Amazon. But for me it’s worth it to preorder books, lot having to wait on library list for new releases. Now my wife reads as much as I do, probably more, but she wants, needs, to hold a book in her hand. Good luck….and keep reading.